Big Soda Lake (Nevada). 3. Pelagic methanogenesis and anaerobic methane oxidation1

Iversen, Niels; Oremland, Ronald S.; Klug, Michael J.

doi:10.4319/lo.1987.32.4.0804

Cited by 146 publications

(100 citation statements)

References 35 publications

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“…Dissolved CH 4 concentrations in Ursu and Fara Fund lakes (Table 2) were found to be within the typical range observed in the monimolimnion of several types of lakes (for example, Schubert et al, 2010), including the hypersaline Big Soda Lake (Iversen et al, 1987). The monimolimnion of a lake typically shows CH 4 with a stable C isotope composition (δ 13 C CH4 ) that is higher ( 13 C-enriched) compared with that in the deeper anoxic CH 4 -producing layers (generally o − 65‰), and lower ( 13 C-depleted) compared with that in the shallower water (4 − 50‰; see, for example, Iversen et al, 1987), because of moderate CH 4 oxidation.…”

Section: Water Chemistrymentioning

confidence: 97%

“…The monimolimnion of a lake typically shows CH 4 with a stable C isotope composition (δ 13 C CH4 ) that is higher ( 13 C-enriched) compared with that in the deeper anoxic CH 4 -producing layers (generally o − 65‰), and lower ( 13 C-depleted) compared with that in the shallower water (4 − 50‰; see, for example, Iversen et al, 1987), because of moderate CH 4 oxidation. The monimolimnion δ 13 C CH4 values of Ursu and Fara Fund (from − 59.7 to − 63.1‰; Table 2) are consistent with this general trend.…”

Section: Water Chemistrymentioning

confidence: 99%

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Contrasting taxonomic stratification of microbial communities in two hypersaline meromictic lakes

et al. 2015

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Hypersaline meromictic lakes are extreme environments in which water stratification is associated with powerful physicochemical gradients and high salt concentrations. Furthermore, their physical stability coupled with vertical water column partitioning makes them important research model systems in microbial niche differentiation and biogeochemical cycling. Here, we compare the prokaryotic assemblages from Ursu and Fara Fund hypersaline meromictic lakes (Transylvanian Basin, Romania) in relation to their limnological factors and infer their role in elemental cycling by matching taxa to known taxon-specific biogeochemical functions. To assess the composition and structure of prokaryotic communities and the environmental factors that structure them, deepcoverage small subunit (SSU) ribosomal RNA (rDNA) amplicon sequencing, community domainspecific quantitative PCR and physicochemical analyses were performed on samples collected along depth profiles. The analyses showed that the lakes harbored multiple and diverse prokaryotic communities whose distribution mirrored the water stratification patterns. Ursu Lake was found to be dominated by Bacteria and to have a greater prokaryotic diversity than Fara Fund Lake that harbored an increased cell density and was populated mostly by Archaea within oxic strata. In spite of their contrasting diversity, the microbial populations indigenous to each lake pointed to similar physiological functions within carbon degradation and sulfate reduction. Furthermore, the taxonomy results coupled with methane detection and its stable C isotope composition indicated the presence of a yet-undescribed methanogenic group in the lakes' hypersaline monimolimnion. In addition, ultrasmall uncultivated archaeal lineages were detected in the chemocline of Fara Fund Lake, where the recently proposed Nanohaloarchaeota phylum was found to thrive.

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Section: Water Chemistrymentioning

confidence: 97%

Section: Water Chemistrymentioning

confidence: 99%

Contrasting taxonomic stratification of microbial communities in two hypersaline meromictic lakes

et al. 2015

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“…The annual CH, budget of lakes is controlled by complex interactions of CH4 production in bottom sediments, oxidation in the water column, and loss to the atmosphere by diffusion and ebullition (Kuivila et al 1988;Iversen et al 1987;Rudd and Hamilton 1978;Reeburgh and Acknowledgments Funding for this research was provided by the U.S. Geological Survey Global Change Hydrology Program.…”

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confidence: 99%

Potential methane emission from north‐temperate lakes following ice melt

Michmerhuizen

Striegl

McDonald

1996

Limnology & Oceanography

162

186

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Methane, a radiatively active "greenhouse" gas, is emitted from lakes to the atmosphere throughout the open-water season. However, annual lake CH, emissions calculated solely from open-water measurements that exclude the time of spring ice melt may substantially underestimate the lake CH, source strength. We estimated potential spring CH4 emission at the time of ice melt for 19 lakes in northern Minnesota and Wisconsin. Lakes ranged in area from 2.7 to 57,300 ha and varied in littoral zone sediment type. Regression analyses indicated that lake area explained 38% of the variance in potential CH4 emission for relatively undisturbed lakes; as lake area increases potential CH4 emission per unit area decreases. Inclusion of a second term accounting for the presence or absence of soft organic-rich littoral-zone sediments explained 83% of the variance in potential spring CH, emission. Total estimated spring CH, emission for 1993 for all Minnesota

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“…The distribution of CH, and CH, oxidation activity has been studied in several eutrophic (e.g. Jannasch 1975;Rudd et al 1974;Rudd and Hamilton 1978;Harrits and Hanson 1980;Iversen et al 1987) and oligotrophic lakes (Lidstrom and Somers 1984;Lilley et al 1988;Schmidt and Conrad 1993). Most reports have focused on dimictic lakes that have a seasonally formed anaerobic layer in the hypolimnion, and the studies have been done during the period of summer stratification.…”

mentioning

confidence: 99%

Dynamics of dissolved methane and methane oxidation in dimictic Lake Nojiri during winter

Utsumi

Nojiri

Nakamura

et al. 1998

Limnology & Oceanography

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Changes in the vertical distribution of dissolved CH, were monitored during the autumnal lake overturn period in mesotrophic Lake Nojiri, Japan (4.4 km* in area and 9.4 X 10' m3 in vol). A survey in 1992 revealed that the surface CH, concentration was highest in December, when the lake overturned. During the following two winters (1993-1994 and 1994-1995) we carried out detailed sampling during the autumnal overturn period. As a result of lake overturn in mid-December, CH, that had accumulated in the hypolimnion during the stratification period mixed rapidly throughout the water column. Increased CH, in the epilimnion quickly disappeared after the overturn as a result of the rising of CH, oxidation activity throughout the water column. The in situ-specific CH, oxidation rate peaked at 0.274, 0.235, and 1.01 d-' at 0.5, 20, and 36 m, respectively, during the overturn, and then declined the following month. During this period, the diffusive flux of methane across the air-water interface increased but was not the dominant sink (avg rate of 4.5 kg lake-' d-l); instead, methane oxidation in the water column was the dominant CH, sink (avg rate of 67.8 kg lake-' d-l), removing -94% of the CH, during the overturn period. A significant methane flux from the bottom sediments throughout the overturn period was confirmed but decreased gradually as the overturn proceeded. The production of organic carbon as a result of CH, oxidation in the water column by methanotrophs was comparable in extent to that generated by primary production at that time.

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Big Soda Lake (Nevada). 3. Pelagic methanogenesis and anaerobic methane oxidation1

Cited by 146 publications

References 35 publications

Contrasting taxonomic stratification of microbial communities in two hypersaline meromictic lakes

Contrasting taxonomic stratification of microbial communities in two hypersaline meromictic lakes

Potential methane emission from north‐temperate lakes following ice melt

Dynamics of dissolved methane and methane oxidation in dimictic Lake Nojiri during winter

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